ARM defines __ARCH_WANT_SYS_RT_SIG(ACTION|SUSPEND) whichproduces the following sparse warnings in kernel/signal.c: warning: symbol 'sys_rt_sigaction' was not declared. Should it be static? warning: symbol 'sys_rt_sigsuspend' was not declared. Should it be static?

Since ARM doesn't include <asm-generic/syscalls.h>, due to differentcalling conventions for some system calls, prototype the functionsin <asm/unistd.h> to quiet the noise.